초록 ▼

This invention relates to a method for producing cellular molded article in mold pattern of synthetic resin having surface skin which is used, for example, as an automobile interior trim material or the like and a mold pattern for producing thereof. This invention aims to provide a method for produc

This invention relates to a method for producing cellular molded article in mold pattern of synthetic resin having surface skin which is used, for example, as an automobile interior trim material or the like and a mold pattern for producing thereof. This invention aims to provide a method for producing cellular molded article of synthetic resin having surface skin which has good production efficiency and which comprises that cellular molded article of synthetic resin obtained by cellular molding of expanded beads in which poor melt bonding does not occur and thermoplastic resin skin material united with this cellular molded article of synthetic resin which has excellent appearance without residing beads pattern on its surface, and a mold used for producing thereof. In so-called simultaneous united molding, at least the part of one mold part (5) on which thermoplastic resin skin material (3) is set is made of gas permeable metal mold, gas permeable ceramic mold or gas permeable electron casted mold (5d) having fine gas permeable holes of not more than 100 .mu.m of diameter on the whole surface (5a) and at least during steam heating and before expanding expanded beads (8), one mold part (5) on which thermoplastic resin skin material (3) is set is made to be the upper part, and the other mold part (6) is made to be the lower part.

대표청구항 ▼

[ What is claimed is:] [2.]2. A method for producing a cellular molded article of a synthetic resin having a surface skin which comprises that in a method for producing the cellular molded article of the synthetic resin having a surface skin in which thermoplastic resin is set in any one of two mold

[ What is claimed is:] [2.]2. A method for producing a cellular molded article of a synthetic resin having a surface skin which comprises that in a method for producing the cellular molded article of the synthetic resin having a surface skin in which thermoplastic resin is set in any one of two mold parts which comprises the molding chamber, and after clamping the parts, expanded beads are charged into this molding chamber and then expanded and melt bonded together by steam heating, along with being melt bonded and united with the said thermoplastic resin skin material, a fine unevenness having 5 to 150 .mu.m of amplitude, 30 to 600 .mu.m of wavelength of the surface roughness waveshape is formed in advance on the surface of the said one mold part, and when melt bonding the said expanded beads together along with melt bonding and uniting these expanded beads with the said thermoplastic resin skin material, by printing the said fine unevenness surface to make the surface roughness of a prescribed range of the thermoplastic resin skin material and by the expanding force of the said expanded beads to press hard the thermoplastic resin skin material onto one of the mold parts, the surface roughness of a prescribed range of the thermoplastic resin skin is made to be approximately the same surface roughness of the other range, and the surface roughness of this thermoplastic resin surface skin material is kept nearly uniform.